Loud Buzzing noise on dvd using nero vision express



I hope some one can help me. I have two problems. 1: Sometimes when I convert an xvid or divx movie to dvd using Nero Vision Express 3 I get a horribly loud buzzing sound half way through the completed dvd. Now this only happens sometimes. When I’m re-encoding I leave the computer alone and let it do its thing, I don’t run any other programs. 2: Also when a divx movie is in two parts and I merge and create chapters the process stops with an error:

[18:30:45] DVDEngine ERROR
[18:30:45] DVDEngine cause: 128 (nmc_processing_exception)
[18:30:45] DVDEngine source: CNeroMpegVideoStream::PrepareNextSegment
[18:30:45] DVDEngine description: no more segments left
[18:30:45] DVDEngine

If the divx is not split then all is fine.

My computer specs are: Compaq P110 21" Flat Screen Monitor
Thermaltake Xaser II 5000 Plus Tower Case
AMD xp2500+ OC to xp3200 @2.21 GHz
Asus A7N8X DLX ACPI BIOS Rev 1008
Creative Inspire 6.1 6600 speaker
Leadtek NVIDIA GeForce 6600 GT 128MB
Creative Audigy 2 value sound card
Leadtek TV2000 XP Deluxe TV Tuner
1024MB PC3200 DDR Hynix
80GB HDD Western Digital
80GB Seagate
200GB sata(non raid setup)
320GB sata
Asus5224A 52x24x52x CD/RW 1.35
Nec 3500A DL DVD
OS: XP Pro SP2